Lost... and still not found!

As some of you might remember, I held my own private art retreat last October when my hubby was gone for a guitar conference. I made some really cool faces using molds and air-dry polymer clay...

But now I have a mystery on my hands... I can't find these little devils ANYWHERE!! I recently cleaned out my studio and can honestly say that I personally touched every single thing in there and I did NOT see these guys. I've been looking for them for over an hour now and... nada. Did they sprout legs and wander off??